lilyedgar06 lilyedgar06
  • 03-08-2021
  • Mathematics
contestada

Find a and b such that ab = 15
and a+b = -8.

Respuesta :

doomdabomb
doomdabomb doomdabomb
  • 03-08-2021
Answer:

a = -3 or -5 and b = -5 or -3

Step-by-step explanation:

a + b = -8

ab = 15

b = 15/a

b = 15/(-3)

b = -5

a(-5) = 15

(-5)a = 15

(-5)/5 = 15/-5

a = -3

a + b = -8

-3 - 5 = -8

-8 = -8
Answer Link

Otras preguntas

What is the solution to this system of linear equations: y-x=4 and y+2x=1 1) (-1,3) 2) (0,4) 3) (1,-1) 4) (-3,3)
what percentage of 1457 is 898?
What is 2.333333 in fraction form
a piece of wood is 180cm long, Tom cuts it into three pieces in the ratio 2:3:4 Work out the length of the longest piece
In a class of 35 students, 25 girls averaged 92% on the last test, while the 10 boys averaged 85% on the same test. What is the average for the entire class on
If you multiply a number by five and then subtract negative ten, the difference is negative thirty. What is the number?
what is the cubic root of - 250
In a sale, normal prices are reduced by 12% The sale price of a digital camera is £132.88 Work out the normal price of the digital camera (3marks)
A certain test is worth 155 points. How many points (rounded to the nearest point) are needed to obtain a score of 65%?
20% of my money is £2.55 What is 2/5 of it?